I know how to say the following in other words but I would like to know how to make relative clause for it:
A boy, the search for whom took a month.
or
A boy, for whom the search took a month.
Additional question regarding word order:
I know him for what he is.
Will the negative clause be like this?
I do not know him for what he is.
And question:
Do you know him for what he is?